OBM may refer to:Of Blessed Memory, an honorific used in Judaism when naming and speaking of the deceased. Old Brewery Mission, a homeless shelter located in Montreal. Organizational Behavior Management, applying the study of behavior to organizations to promote worker safety and other benefits Original brand manufacturer, a company that sells a product made in whole or in part by a second company as its own branded product Outboard motor, a propulsion system for boats OBM, in steelmaking "Oxygen Blowing Machine",, a process in Steelmaking Oliver Batista Meier, a German professional footballer Olimpíada Brasileira de Matemática, an annual mathematics competition for Brazilian students.